Electronic apparatus, display device, and voltage management method
A reference voltage generator configured to be supplied with a first voltage from an external device and to generate a reference voltage which is a voltage lower than a second voltage which is a voltage higher than the first voltage supplied from the external device on the basis of the second voltage through negotiation with the external device; a determiner configured to determine a magnitude relationship between the second voltage and the reference voltage; and an output configured to notify that a voltage has decreased when the second voltage is equal to or lower than the reference voltage on the basis of the result of determination are included.
1. An electronic apparatus comprising:
a reference voltage generator configured to
perform, with an external device, a negotiation for requesting a second voltage which is higher than a first voltage when the electronic apparatus receives the first voltage from the external device, and
generate a reference voltage which is lower than the second voltage on a basis of the second voltage;
a determiner configured to determine a magnitude relationship between the second voltage and the reference voltage; and
an output configured to notify that the second voltage is decreasing when the second voltage is equal to or lower than the reference voltage on a basis of a result of determination.
2. The electronic apparatus according to claim 1 ,
wherein the reference voltage generator comprises:
a first reference voltage generator configured to generate a first reference voltage lower than a voltage determined through the negotiation; and
a second reference voltage generator configured to generate a second reference voltage lower than the first reference voltage,
wherein the determiner comprises:
a first determiner configured to determine a magnitude relationship between the second voltage and the first reference voltage; and
a second determiner configured to determine a magnitude relationship between the second voltage and the second reference voltage, and
wherein the output comprises:
a first output configured to output a result indicating that the second voltage is equal to or lower than the first reference voltage on a basis of a result of determination from the first determiner; and
a second output configured to output a result indicating that the second voltage is equal to or lower than the second reference voltage on a basis of a result of determination from the first determiner.
3. The electronic apparatus according to claim 2 ,
wherein the second output is configured to output a message indicating that a residual capacity of a battery provided in the external device decreases.
4. The electronic apparatus according to claim 2 , the electronic apparatus further comprising:
a power supply managing unit configured to cut off supply of electric power to a monitor provided in the electronic apparatus on a basis of an output of the second output.
5. The electronic apparatus according to claim 1 ,
wherein the reference voltage generator comprises:
a first DCDC converter configured to generate a reference voltage by stepping down the second voltage supplied from the external device.
6. The electronic apparatus according to claim 1 , the electronic apparatus further comprising:
a second DCDC converter configured to generate a third voltage which is requested from the external device through the negotiation from a voltage supplied from the external device,
wherein the reference voltage generator generates the reference voltage from the voltage output from second DCDC converter.
7. The electronic apparatus according to claim 1 ,
wherein the output employs one of a lamp and a display panel.
8. A display device comprising:
a reference voltage generator configured to
perform, with an external device, a negotiation for requesting a second voltage which is higher than a first voltage when the electronic apparatus receives the first voltage from the external device, and
generate a reference voltage which is lower than the second voltage on a basis of the second voltage;
a determiner configured to determine a magnitude relationship between the second voltage and the reference voltage; and
an output configured to notify that the second voltage is decreasing when the second voltage is equal to or lower than the reference voltage on a basis of a result of determination.
9. A voltage management method comprising:
performing, with an external device, a negotiation for requesting a second voltage which is higher than a first voltage when the electronic apparatus receives the first voltage from the external device;
generating a reference voltage which is lower than the second voltage on a basis of the second voltage;
determining a magnitude relationship between the second voltage and the reference voltage; and
notifying that the second voltage is decreasing when the second voltage is equal to or lower than the reference voltage on a basis of a result of determination.